I don't know if it's the same bug but I've certainly seen a similar bug (weird glitches in display that disappear when you scroll) on Fedora with AMD graphics (

I don't know if it's the same bug but I've certainly seen a similar bug (weird glitches in display that disappear when you scroll) on Fedora with AMD graphics (open source amdgpu driver, X), running Firefox nightly. One screen only..